Water-spraying device for pneumatic tools.



A. H. TAYLOR. WATEE SEEEYIEG DEvIcE Eon ENEUMATIG TooLs.

APPLIOATION FILED FEB. 21, 1908. 905 ,388, Patented Dec. 1

u l l l l l l l l 1 n l I, mfmm UNITEDA sTATEsSPATnT oFFioE.

ALBERT H. TAYLOR, OF EASTON, PENNSYLVANIA, ASSIGNOR, TO INGERSOLL-RAND PANY, OF NEW YORK, Y., A CORPORATIONOFANEW JERSEY.

COM-

WATEB-SPRAYING DEVICE FOR PNEUMATIC IIOOLS.

To all whom it may concern:

Be it known that I, ALBERT H. TAYLOR, a citizen of the United States, and resident of Easton, in the county of Northampton and State of Pennsylvania,.have invented a new and useful `Improvement in Water-Spraying Devices for Pneumatic Tools, of which the following is a specification.

My invention relates to a water spraying device for use in connection with penumatic tools and it is directed more particularly to a water spraying device for use in connection with hammer drills, where it is desirable that the dust which is cut by the drill steel, should be laid by coming in contact with the spray of water, as the dust leaves the hole being bored.

In ordinary practice where airis used to clean the hole being bored, the dust is blown out of the hole and mixes with the atmosphere, thus rendering the air unfit for breathing and dangerous for the operator, especially so .in closed workings, such as mines and tunnels.

.The object of my invention is to provide an ejector which is connected to a water supply ard to th'e exhaust air from the tool, whereby a jet of 'air issuing from the force lnozzle of the ejector will draw water from the water supply and force it through the discharge nozzle of the ejector in the form of a spray of water which may be directed against the mouthof the hole being bored, thus dampening the dust particles before they have time to mix with the air and causing the particles to be precipitated.

A practical embodiment of my inventionis represented in the accompanying draw- 1n s in-wh1ch f igure 1 is a view 1n sideelevation, show- ,inor a hand pneumatic tool ofthe hammer dri-ll type with my water spraying device applied thereto, the parts being shown in osition as in use, Fig. 2 is a detail longitu inal.

central section on an enlarged scale, through the tool and rotating handle, Fig. 3 is a transverse section taken in the 'plane of the line A-A of Fig. 2, looking in the direction of the arrows, and Fig. liis a transverse section taken in the plare of the line B-B of Fig. 2, looking in the direction of the.

arrows.

The water spraying device is herein shown as applied to a hammer drill vof the well known axial valve type.

Specification of Letters Patent. Application led February 21, 19,08. Serial No. 416,973.

Patented Dec. 1, isos.' Y

The tool handle is denoted by 1, the cylinder or barrel, by 2; the-drill steel by 3 and the rotating handle by` 4, 5. The air supply pipe 6 leads -to the tool handle l, from any suitable source of supply, not shown herein.

A pipe 7 leads from a source of water supply, such, for instance, as a tub or cask 8, to

' the outer end of the member 5 of the rotat ing handle, which member is made hollow to provide a water supply chamber 9. The cylinder or barrel 2 of the tool is provided with one or more air exhaust ports 10. The members Il and .5 of the rotating handle have formed therein an annular air supply chamber 11 in communication with the air ex. haust ports v1U of the tool. The ejector, carried by the hollow rotating handle, comprises a discharge nozzle 12 in communica tion with the water supply chamber 9, and a force -nozzle 13 in communication with the air supply chamber 11, through a passage 14.

When the tool is in operation, a jet of exhaust air from the tool is directed from the force nozzle 13 into the discharge nozzle 12 of lthe ejector, 'for lifting the Water'from its from the tool for spraying the water onto thej desired spot. y f

2. A water spraying device for pneumatic tools, comprising a hollow rotating handle and an ejector carried thereby vin communication with a water supplypand the exhaust air from the tool, forespray'ing the water o n to lthe desired spot. J j

3. A water spraying device for pneumatic tools, comprising a hollow rotating handle and an ejector carried thereby, for spraying water on to the Ydesired spot, said handle having a water supply chambertherein in communication with the discharge nozzle of the ejector and an air supply chamber there# in in communication with the exhaust port of the tool and the force nozzle of the ejector.

4. A pneumatic tool comprising a tool hanwater supply pipe leading to said Water supdle, an air supply pipe leading thereto, a ply chamber in the rotating handle. cylinder having an exhaust port, a hollow l [n testimony, that I claim the foregoing rotating handle carried by the cylinder, an as' ,my invention, I have signed my name in L, ejector1y carried by the handle for spraying l presence of two Witnesses, this 19thvday of Water;A on to the desired spot, said handle February 1908. having an air supply chamber therein ini communication with the exhaust port and force nozzle of the ejector, and a Water supg Vtnesses: ply chamber therein in communication with 1 WARD RAYMOND,

the discharge nozzle of the ejector, and a l RUSSELL H. WILHELM ALBERT H. TAYLOR. 

